Part of the Case Repair Manuals.
Need the factory teardown specs for your Case 422/M2 or 422T/M2 engine? This 73-page service manual (OEM #Bur 6-79550NA) covers both the naturally aspirated M2 and turbocharged T/M2 variants, from first bolt removal through final run-in after overhaul. Inside: engine service specifications for both variants, a full troubleshooting section covering irregular running, overheat, faulty charging, and excessive smoke, plus dedicated turbocharger troubleshooting for the 422T/M2. You also get detailed exploded views of every major assembly, step-by-step disassembly and reassembly procedures for the cylinder head, pistons, governor, and fuel injection nozzles, and a complete engine torque specifications table. Tighten injection pipe nuts to 15-24 Nm (11-18 lb-ft); nozzle holder torque is 58-69 Nm (43-51 lb-ft). Your engine is apart and the clock is running. Bookmarked and searchable: jump to any procedure on your tablet without scrolling through pages.
What's Inside This Case 422/M2, 422T/M2 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Description | 5 | Cylinder Block, Crankshaft, Pistons and Connecting Rods, Camshaft, Cylinder Head, Rocker Cover and Inlet Manifold |
| Engine Component Descriptions | 6 | Bs05B258, Bs05B259, Cylinder Block, Crankshaft, Pistons and Connecting Rods, Camshaft |
| Engine Model and Serial Number Location | 7 | Cylinder Head, Rocker Cover and Inlet Manifold, Gear Train, Fuel System, Lubricating System, Cooling System, Bs05B260, Turbocharger Lubrication |
| Safety Precautions | 8-13 | Do Not Remove the Radiator Cap While the Engine Is Hot and the Coolant Is Under |
| Irregular Running of the Engine | 14 | Engine Stops During Operation, Overheat of the Engine |
| Faulty Charging | 15 | Starter Motor Does Not Run, Oil Pressure Lamp Not Turned Off |
| Excessive Smoke/Engine Miss | 16-17 | 422T/M2 Turbocharger Bearing Failures, 422T/M2 Engine Noise/Whistling, Excessive Oil Consumption (or Oil Smoke From Exhaust) |
| Alternator | 24 | Alternator Wire Harness, Alternator Pivot, Adjusting Bracket |
| Remove Cooling Fan and Pulley | 24 | Cooling Fan, Pulley, Fan Retaining Hardware, Spacers |
| Fuel Injection Pipe | 24 | Fuel Pipe Nuts, Fuel Injection Pump, Injectors, Pipes |
| Injector Assembly | 24 | Securing Nuts, Leak-Off Rail, Aluminum Washers, Injectors |
| Water Pump Assembly | 25 | Securing Bolts, Set Plate |
| Exhaust Manifold | 25 | Inlet Manifold, Spacer |
| External Oil Pipe (422/M2) | 25 | Banjo Bolts, Cylinder Block Main Oil Gallery, Cylinder Head Assembly, Clamp, Fuel Injection Pump |
| External Oil Pipe (422T/M2) | 26 | - |
| Rocker Assembly | 26-29 | - |
| Disassembly and Assembly | 30 | - |
| Rocker Assembly | 30 | - |
| Cylinder Head Assembly | 30 | Inspection, Valve to Valve Guide Clearance, Valve Seat Recess, Valve Seat, Valve Spring, Reassembly |
| Valve Guide and Valve Stem | 31-32 | Valve Stem Wear, Valve Stem Diameters, Intake Valve, Exhaust Valve, Valve to Valve Guide Clearance |
| Cylinder Block | 33 | Inspection and Correction, Cylinder Block Top Face, Cylinder Bore, Bore Specifications |
| Piston and Piston Rings | 34-45 | Disassembly, Inspection, Piston, Oversized Piston, Piston Ring, Piston Ring Gap |
| Engine Governor Assembly | 46 | - |
| Governor Operation | 47-57 | Construction/Function, Maximum Speed Set Bolt, Maximum Fuel and Start Spring |
| How to Operate the Engine After Overhaul | 58 | - |
| Fuel Injection Nozzle and Holder | 58-62 | Specification, Construction/Function, Throttle-Type Nozzle, Disassembly/Inspection, Reassembly/Adjustment, Spray Condition |
| Turbocharger Troubleshooting | 63-67 | Turbocharger Is Sluggish in Picking Up Speed, Excessive or Abnormal Vibration, Dirty Exhaust Smoke, White Exhaust Smoke, Abnormally High Oil Consumption, Engine Lacks Output Power |
| Abnormal Running Noise | 68-73 | Turbocharger Lubrication, After Turbocharger Service, Check the Exhaust System, Disconnection of the Glow Plug, Notes |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel filter replacement | Replace | p. 13 |
| Air cleaner element action | Clean or replace element | p. 66 |
| Injection nozzle tightening torque | 58 - 69 Nm (43 - 51 pound-feet) | p. 25 |
| Injection pipe tightening torque | 15 - 24 Nm (11 - 18 pound-feet) | p. 25 |
| Valve cover vent hose length | 460 mm (18.1 inches) | p. 16 |
| Gasket/packing replacement | Replace gasket, packing, etc. Use liquid gasket to prevent oil leakage where necessary. | p. 49 |
| Action for insufficient battery charge | Charge or replace battery | p. 13 |
| Thermostat opening temperature | 71° C (160° F) | p. 24 |
| Thermostat full open temperature | 82° C (180° F) | p. 24 |
| Cylinder head bolts torque | 98-103 Nm (72-76 pound-feet) | p. 25 |
| Connecting rod nuts torque | 49-54 Nm (36-40 pound-feet) | p. 25 |
| Crankshaft pulley nut torque | 275-333 Nm (203-246 pound-feet) | p. 25 |
Case 422/M2, 422T/M2 Common Problems This Manual Covers
Case 422/M2 engine cranks but won't fire in cold weather, no start p. 13
Check battery condition; charge or replace if insufficient (page 13). Inspect the fuel filter and replace it. Test glow plug resistance with a multimeter and torque any replacement plugs to 15-20 Nm (11-15 pound-feet). If the engine cranks but still won't fire, follow the no-start diagnostic flowchart on page 13.
Manual Section: Engine Starting IssuesEngine temperature climbs past normal operating range, coolant loss visible at overflow p. 14
Inspect the radiator core for debris and clear any blocked airflow. Check coolant level and top up as needed. Test the thermostat: it should begin opening at 71°C (160°F) and reach full lift at 82°C (180°F); replace if it sticks closed. Use the engine overheat flowchart on page 14.
Manual Section: Engine Running IssuesExcessive white or dark exhaust smoke during load, engine misses between cylinders p. 16
Check the air cleaner element and clean or replace it (page 66). Inspect injector spray pattern; valve setting pressure should read 153-163 atm (155-165 kg/cm²). White smoke typically indicates coolant intrusion; dark smoke points to restricted air or over-fueling. Run through the full smoke diagnostic table on page 16.
Manual Section: Excessive Smoke/Engine MissEngine bogs down under load, gradually loses power with no fault codes p. 63
Verify compression on each cylinder; standard is more than 29.5 bar (429 PSI). Check the air cleaner element and clean or replace it. Inspect the fuel filter for restriction and replace if needed. If compression and air supply check out, follow the engine output power diagnostic on page 63.
Manual Section: Turbocharger TroubleshootingTurbocharger makes whistling or grinding noise, slow to spool at full throttle p. 16
Inspect the turbocharger oil supply line for blockage before assuming bearing failure; restricted lubrication is the leading cause. Verify engine oil level: crankcase capacity is 8.7 L (9.2 US quarts) with filter. Check intake and exhaust connections for leaks. Follow the bearing failure and noise checklist on page 16, then the abnormal noise guide on page 68.
Manual Section: Turbocharger Bearing Failures and NoiseOil pressure warning lamp stays on after warm startup, oil pressure low p. 15
Check engine oil level first and top up if low; crankcase capacity is 8.7 L (9.2 US quarts) with filter. Verify oil pressure with a gauge; normal relief pressure is 51-65 PSI. If pressure reads correctly but the lamp stays on, test the oil pressure sender and wiring using the electrical diagnostic on page 15.
Manual Section: Electrical System IssuesFrequently Asked Questions
Torque specs for Case 422/M2 engine head bolts
For Case 422/M2 engines, the cylinder head bolts should be tightened to a specified torque of 98 - 103 Nm (72 - 76 pound-feet) and should be oiled. The tightening procedure involves a 3-step process as shown in the illustration on page 58.
Torque sequence for Case 422T/M2 connecting rod bolts
The connecting rod nuts for the 422T/M2 engine should be tightened to a torque of 49 - 54 Nm (36 - 40 pound-feet). While the manual specifies to install pistons from the front in ascending order and keep rod caps with their respective piston assemblies, a specific tightening sequence for the connecting rod bolts (e.g., a cross-pattern) is not provided.
How do you fix case 422/M2 engine cranks but won't fire in cold weather, no start?
Check battery condition; charge or replace if insufficient (page 13). Inspect the fuel filter and replace it. Test glow plug resistance with a multimeter and torque any replacement plugs to 15-20 Nm (11-15 pound-feet). If the engine cranks but still won't fire, follow the no-start diagnostic flowchart on page 13.
How do you fix engine temperature climbs past normal operating range, coolant loss visible at overflow?
Inspect the radiator core for debris and clear any blocked airflow. Check coolant level and top up as needed. Test the thermostat: it should begin opening at 71°C (160°F) and reach full lift at 82°C (180°F); replace if it sticks closed. Use the engine overheat flowchart on page 14.
What format is this manual in?
You get a 73-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
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